Spring for thread-cutting loom temples



Dec. 4, 1928. 1,693,942

W. l. STIMPSON SPRING FOR THREAD CUTTING LOOM TEMPLES F iled March 7, 1928 Invenior. Wallace l Shmpson Patented Dec. 4, 1928.

u Mrs-D STATI'ES A rr OFEI-GE.

'WALLACEI. 'STIMPSO'N,0F IIOP'EDALE, MASSACHUSETTS, ASSIGN OR TODRAPER COR- PORATION, O F HOPEDALE, MASSACHUSETTS, 'CORPORATION OF -M)A=INE.

' SPRING non TH D-CUTTIN LOOM "rEMPLESQ Applicatioflfilzd March 7, 1928. SerialNo 259,657.

This invention relates to a springfor operating the movable cutter member of a thread cutting loom temple. 7

Such a temple comprises a body or head resentin a forward and rearward extending guideway in which is mounted the movable cutter member which cooperates with a cutting movement is usually given by the lay engaging a heel depending from the movable cutter member, while the return movement to open position is given by spring connected atone end to the'body orhead of-the temple and at'the other end to the cutter member.

Since the movable cutter member is usually s actuated at each beat-up of the-slay this spring functions many times every minute;

If the spring breaks or works out of position or falls oil as aresult of wear or as a result of the shock or fjar incident to the operation of the loom, the movable. cutter anember not only failsto function; but may be thrown out of the guideway and thus do considerable damage either to the loom mechanism, to the cloth being woven, or to shall have an easy and uniform action in operating the cutter member, which shallbe automatically adjustable to ordinary vari- 'ations in construction of similar temples, in

which there s'hallbe no wear due to adjacent coils rubbing against each other, in which there shall be no tendency for the spring to work or be thrown out of position, and in which there shall be a minimum of wear, and

' strain onthestuds to which the spring is connected.

, Itis theobject of theinvention further to. )providesuch a spring in which substantially vall the spring action takes place in a flat open spiral located parallel with the plane of movement ofthecutter member.

It is the further object of the invention materially to decrease or practically to eliminate the breakage of the temple thread cutter spring as a result of the increase in the length of the wire overthat em'ployedin the usual which the coils partaking ofthe spring action The object of the invention is further to provide'such a spring which may bereadily and economically -manuf-actured for use not only with new temples, but for substitution for the springs of existing temples which have becomeworn or unsatisfactory.

These an d other obj coils and features of the invention will appearmore frilly from the accompanying description and drawings and will be particularly pointed outinthe claims.

lVhile the spring ofthis invention is adapted for use in connection "witha widevariety of thread cut-ting temples, a preferred ';en1- bodiment is here sho'wnin connection with a I thread cutting temple of the type disclosed in thep'atent to S; Stimpson, No.1,3663034,

January 18, 1921;

I In the drawings;

Fig. l is aside elevation ofther'nain portion of. such a'temple with a preferred 'form of spring embodying the "invention.

' Fig. 2 is atop plan "view "of theconstruction'shown in Fig.1.

, The thread cutting temple-illustrated as of the type shownin'the' aforesaidfitimp'son patent comprisesthevusual stand 1 which is mounted on the-breast beam-(if the loomfthe shank 2 longitudinally movable in the stand 1 and the body or head3 havingthe depending heel 4. Asthe invention relates entirely to the threadcutting mechanism, no fu'rther description of the templeis necessary, The

temple head isprovi'ded with-a vertical'slot or guideway 5 which extends throughthe head or body portion forward 'and rearward thereof; [lithe-rearward end of thi's sloti or guideway is mounted a fixed c'utter blade 6 1 usually having; a rear verticaljcutting edge.

A movable cutter" member cooperates with this cutterblade to' sever "the filling ends e:-:tending "from-the selvage. This movable cutter member presents a' fiatbodyextending through and mounted to slide and rock infthe g'uideway 5. Its rearward end'is usually in s the form of a hook" 7 present ng cutting edge 8. cooperating with the blade 6, While itsforwardend is provided with a lateral flange 9 limitlng the rearward movement of the nien'iber and guiding the rocking and sliding movement of the member in conjunction with the portion 1010f the body or head I p of the temple. This movable cutter member types and as a result of the construction by also has a a depending heel 11" in. position to be struolrbythe lay upon the beat upg p "NhenLt-he ia tears up, it's'tiikes thisfheel 11, giving the movable cutter member a rocking movement. thus throwing the hook end 7 downward and then sliding the. cutter member forward. The return movement of the movable cuttermember into forward open position is given by a spring and it is with this spring that the invention is concerned.

The cutter member operating spring is quite uniformly connected to two studs,

namely, a cylindrical stud12 extending laterally from a point on the body or head or adjacent portion of the shank of the temple, all of which is herein referred to as the temple head, and a cylindrical stud 13 extending laterally from the heel 11 of the movable cutter member. Thesest-uds are usually cast helix may be wound close together, as shown. 1 Thejsprmg comprises, secondly, an arm 15.

integral with the temple head and cutter member, respectively.

'The spring of this invention is formed of wire which may be of any sultable cross secat the inner end of the cylindrical section14 to engage the temple and prevent rotary movement of the cylindrical section on the stud 12. This arm 15 is preferably formed by extending the wire of the helical coil tangentially rearward into engagement with a shoulder '16 on the temple head, preferably grooved to receive the arm.

The spring comprises,

, spiral 17 lying in a plane normal tothe stud single piece of wire, it will be seen thatthe 12 and having its axis coincident with the axis of the helical coil or cylindrical section 14. With the entire spring formed from a outer coil of the helix 14 merges into the inner coil of the spiral. It will also beseen that the fiat spiral lies in a plane parallel with the plane of movement of the movablecutter member. This spiral is open, by whiohis meant that the coils are separated'so" that in the operation the spring coils of the spiral do not contact with or rub against each other. Thus the spring action extends throughout the spiral and is a free and easy action and as this spring action takes place in a single plane, there is'no tendency to move the entire spring laterally or oil the studs or out of position. 00

The spring comprises, fourthly, a swing- 'ing arm 18 extending from the peripheral coil of the spiral 17 and in the plane thereof and adapted at its free or lower end to en age the movable cutter member and particu arly the stud 13 thereof. This arm 18 prefer thirdly, a flat open ably is tangential withand forms a terminal extension of the peripheral coil of the spiral 17 and swingsin the same plane as the spiral so that there is further no tendency, as a rcvsult of the swinging movementlof this arm, to

move the entire spring out of position. This arm 18 preferablyhas very little spring action in itself because the main spring action takes place in the winding and unwinding of the coils of the-spiral. This armat its lower end is preferably connected to the stud 13 of the movable cutter member and for that purpose terminates in a coil 19 which is made of substantially larger diameter than the diameter, of the stud 13. This feature, together with the general construction of the spring, onables the spring to adjustitself automatically to ordinary variations in distance between. the studs- 12 and 13. Furthermore, the coil 19 and the spiral 17 both lie forward of the arm 18 so that the arm 18 normally stands insubstantially vertical position and as the forward and rearward movement of the movable cutter member is comparatively slight, there is little tendency to bindin or wear of the parts during the operation 0 the cutting mechanism.

There is thus presenteda spring'that may i be readily and economically manufactured,

that may be. readily formed to fit any ofthe usual type of temples, either by varying the length of the arm 18 or the length of the helical coil 14, or both. The spring is subject to practically no tendency to wear or breakage. In the functioning of the spring, none of the coils rub against each other and there is no tendency to shift or move the sprin out of position or to cause it to work ofl aterally from the studs. Substantially allthe spring action takes place. in the flat spiral in a plane parallel with the plane of movement of the cutter member and in a free and easy manner. a

Having thus described the invention',-what is claimed as new, and desiredto be secured by Letters Patent, is: y p I 1. A one-piece wire spring for operating the cuttermember of a thread cutting loom temple comprising a coaxial helical cylindrical coil. and flat open spiral, the helical coil being adapted to fit snugly the usual stud on the temple head and terminating at its inner end in a tangentialshoulder-engaging arm andinerging at its outer end into the center coil of the spiral with the peripheral coil of the spiral terminating in a tangential arm adaptedfto engage at its free end the usual movable cuttermember;

2.'A one-piece wire spring for operating the cutter member of a thread cutting loom temple comprising a coaxial helical cylindrical coil and fiat open spiral, the helical coil being adapted to fit snugly the usual stud" i on the temple head and terminating at its inner end ina tangential shoulder-engaging arm and merging at its outer end into the center coil of the spiral with the peripheral coil of the spiral terminating in a tangential swinging arm having at its free end a coil of larger diameter than, and thus adapted to fit loosely, the usual stud on the movable cutter member.

3. A spring having the construction defined in claim 2, in which the said swinging arm extends at the rear of both the spiral and the coil at the free end thereof.

4. A spring having the construction defined in claim 1, in which the wire is of circular cross section. c

5. A one-piece wire spring for operating the cutter member of a thread cutting loom temple comprising a cylindrical section adapted to fit snugly the usual stud on the temple head and to hold the spring against lateral twisting, an arm at the inner end of said cylindrical section to engage the temple and prevent rotary movement in one direction on the said stud, an open flat spiral lying in a plane normal to said stud and coaxial with said cylindrical section and having its central coil merging thereinto, and a swingingarm extending from the peripheral coil of the spiral in the plane thereof and adapted to engage at its free end the usual movable cutter member.

6. A one-piece wire spring for operating the cutter member of a thread cutting loom temple comprising a cylindrical section adapted to fit snugly the usual stud on the temple head and to hold the. s )ringagainst lateral twisting, an arm at the inner end of said cylindrical section to engage the temple and prevent rotary movement in one direction on the said stud, an open fiat spiral lying in a plane normal to said stud and coaxial with said cylindrical section and having its central coil merging thereinto, and a swing ing arm extending from the peripheral coil of the spiral in the plane thereof and termi nating at its free end in a coil oflarger diameter than, and thus adapted to fit loosely, the usual stud on the movable cutter member. In testimony whereof, I have signed my name to this specification. c

WALLACE I. STIMPSON. 

